/Engine/Source/Runtime/Core/Public/Virtualization/VirtualizationSystem.h
Should return the payload for the givenFIoHash. If the provider fails to find the payload then it should return a nullFCompressedBufferto indicate the error.
[FCompressedBuffer](API\Runtime\Core\Compression\FCompressedBuffer) RequestPayload ( const [FIoHash](API\Runtime\Core\IO\FIoHash) & Identifier )